Shaving machine



June 7, 1932. w FEYRER 1,861,564

SHAVING MACHINE Filed Nov 9, 1928 4 Sheets-Sheet 1 INVENTOR. Wuhan? I. Feyrei;

I BY M MAfiT O RNEYSJ W. F. FEYRER SHAVING MACHINE Jun 7, 1932.

4 Sheets-Sheet 2 Filed NOV 9, 1928 A 5. mm W m N] @(T IF U June 7, 1932. w E FEYRER 1,861,564

SHAVING MACHINE Filed Nov 9, 1928 4 Sheets-Sheet 3 INVENTOR.

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W. F. FEYRER SHAVING MACHINE June 7, 1932.

4 Sheets-Sheet 4 Filed NOV 9, 1928 E NM INVENTORH Wc'llam 1'7 Feyrer;

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Patented June 7, 1932 UNITED STATES PATENT 'OFFECE WILLIAM F. FEYRER, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR T DICT'APHONE g CORPORATION, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF NEW YORK SHAVING MACHINE Application filed November 9, 1928.

This invention relates generally to record resurfacing machines for shaving records intended for use with dictation machines, and more particularly to means for advancing, and means for releasing and retracting the shaving knife.

It is an object of this invention to provide in a record resurfacing machine a simple, positive arrangement by means of which the knife is automatically advanced at the end of each shaving out without manual operation, and also to provide suitable means for controlling the movement and adjustment of the knife.

Other objects and advantages of the invention will appear hereinafter.

For convenience, throughout the specification, the term record is used to designate any member upon which speech has been or may be recorded, and the term knife is used to designate any tool which is adapted to be used in preparing or conditioning the record surface so that speech may be recorded thereupon.

A preferred embodiment of the invention selected for purposes of illustration is disclosed in the accompanying drawings, in which, r

Fig. l is a top plan view of the left hand portion of a record resurfacing machine showing this invention applied thereto.

Fig. 2 is a view, partly in elevation and partly in section, substantially on the line 22 of Fig. 1.

Figs. 3, 4 and 5 are additional top plan views of a portion of a record resurfacing machine shown in Fig. 1, with parts removed and broken away so as more clearly to disclose the operation of the knife advancing means.

Figs. 6, 7 and 8 are rear elevation views of the record resurfacing machine shown in Figs. 1 to 5, with parts removed so as more clearly to disclose the operation of the knife acbsancing means and the knife releasing means.

Fig. 9 is a perspective view of the combined stop pawl and release lever for controlling the knife adjustment.

Referring first to Fig. 1, the record resur- Serial No. 318,165.

facing machine comprises a base plate 12, which has mounted thereupon, near the left hand edge thereof, the standards 13, 13a and 136. Also mounted upon the base plate 12, and to the right of the standard 13, is another standard 14. Suitable aligned bearings in the standards 13 and 14 support the left hand end of a mandrel shaft 15 extending longitudinally of the machine- That portion of themandrel shaft 15 which extends to the right of the standard 14 carries a mandrel 16, which in turn has mounted thereon a cylindrical record 17 which is to be resurfaced. The right hand end of the mandrel shaft 15, which will project beyond the right hand end of the mandrel 16, may be centered and supported by any suitable means, (not shown) which permits removal and replacement of the record 17 upon the mandrel 16.

Between the standards 13 and 14 the mandrel shaft 15 carries the pulleys 21 and 24. The pulley 21 is connected by'meansof a belt 22, which passes downwardly through an opening 12a in the base plate 12, with any suitable driving means (not shown).

The standard 136, which is near the rear of the base plate 12, and another standard, (not shown) on the right hand portion of the base plate 12 have suitable aligned bearings for supporting a feed screw 20 parallel to the mandrel shaft 15. The feed screw 20 carries a pulley 25 near its left hand end, and the pulley 25 is connected by means of a belt 23 to the pulley 24, so that rotation of the mandrel shaft 15 will cause the feed screw 20 to rotate. Immediately to the right of the pulley 25 the shaft 20 has a recessed portion 29 which is not threaded. The function of this recessed portion 29 will appear hereinafter.

The standard 13a supports the left hand end of a carriage rod 19, whichat its other end is supported by a similar standard, (not shown) also mounted-on the base plate 12. Slidablyand tiltably mounted upon the car riage rod 19 is a carriage 18. The carriage 18 has a forwardly projecting arm 18a, which, as may be seen at the left hand portion of Fig. 2, has a shoe 28a adapted to ride along drel 16.

spring 27 which extends rearwardly of the.

carriage 18, and projects downwardly under the feed screw 20. Mounted on the upper side and near the rear end of this spring 27 is a feed nut 26 which normally is held in yielding engagement with the feed screw 20 by means of the spring 27. It is apparent that such an arrangement provides for movement of the carriage along the guide rod 19 when the feed screw 20 is rotating and the feed nut 26 is in engagement with the threadedportion of the feed screw.

Fig. 1 discloses the resurfacing machine with the carriage 18 nearly at the left hand end thereof, which is its position near the termination of a shaving out. Uponfurther rotation of the feed screw 20 the carriage 18 will be moved to the left until a shaving knife mounted on the carriage clears the lefthand end of the record 17 and the feed nut 26 reaches the recessed portion 29 of the feed screw 20. When this position is reached, the

feed nut 26 is operatively disconnected from the feed screw 20, and further movement of the carriage 18 to the left will be prevented by the abutment of the left hand end of the carriage against a shoulder 19a on the left hand end of the carriage rod 19.

When it is desired to slide the carriage 18 along the rod 19 by hand, as in preparing the machine preliminarily to making a shaving cut, the carriage is tilted or turned about the rod 19 as a pivot by lifting the arm 18a of the carriage to swing the feed nut 26 away from the feed screw 20. The carriage may then be moved along the rod 19 by a sliding movement to any desired position.

- Extending longitudinally of the base plate 12, to the rear of the mandrel 16, is an open ing 12b for receiving the chips and shavings removed from the record during the conditioning operation.

As may be seen in Figs. 1 and 2, the carriage 18 is provided with a knife-bar 30 mounted for longitudinal movement toward and from the record 17 carried by the man- Mounted on the forward end of the knife bar 30 is a suitable tool 33 for shaving or otherwise conditioning the outer surface of the record 17. By way of example 33 has been shown as a knife.

Referring to Fig. 2 for a further disclosure of the knife bar mounting it will be seen that the knife bar 30 is adapted to slide in a stepped bore 38av extending transversely of the main body portion of the carriage 18 above the carriage rod 19. In order to prevent turning of the knife bar 30 about its longitudinal axis, the knife bar may be provided, for example, on its upper side, with a longitudinally extending groove which will slidably engage the inner end of a screw 61 projecting into the bore 38a.

As seen in Fig. 2, the knife bar 30 has near its right hand end an enlarged shoulder 30a which slides in and fits the enlarged portion of the bore 38a. Surrounding the knife bar 30, and between-the shoulder of the bore 38a and the shoulder 30a of the knife bar is a spiral spring 38. The spring-38 is under compression so as normally to tend to move the knife bar 30 away from the record 17. s 3

As may better be seen in Fig. 1, to the right of and parallel to the knife bar 30 is a gauge bar 31 whichv is slidably. mounted in a stepped bore of the carriage 18. The knife bar 30 is interconnected with the gauge bar 31 near the rear ends of the two bars by means of a. bar or plate 32. Because of the connecting plate 32 between the knife bar 30 and the gauge bar 31 these two members will move in unison. The connection hetween'the knife bar 30 and the gauge bar 31 preferably is adjustable to permit the gauge bar and the knife bar to be removed and set longitudinally to each other in a predetermined position.- The knife and gauge bars will be adjusted so that the knife 33 will project toward the record 17 a greater distance than theforward end of the gauge bar,

this difference in distances being made equal to the depth of the cut to be made by the knife.

Referring to Fig. 1, when it is desired to set the knife for the initial cut on a record the left hand end of the carriage 18 will lie against theshoulder 19a, which is its position at the endof a shaving operation. With the carriage in this position the knife 33 and the knifebar 30 will be to the left of and clear of the left hand end of the record 17, but the forward end of the gauge bar 31 will overlie the left hand end of the record. The interconnected knife and gauge bars are then moved tward the record 17 until the forward end of the latter bar engages the rec 0rd surface. The knife and gauge bars are then locked in this adjusted position relative to the carriage 18. Since the knife 33 projects beyond the forward end of the gauge bar toward the record, the knife is all set for the making of a first shaving cut.

The next step in the operation of preparing the machine to make a shaving cut is to turn the carriage about the rod 19 by lifting the hand grip 46. This turning movement swings the feed nut 26 away from the feed screw 20, and moves the knife 33 and the gauge bar 31 so that they will clear the record 17 on the mandrel 16. The carriage may then be moved to the right along the rod 19. When the carriage has been moved to the right hand end of the machine the hand grip 46 is lowered, and the feed nut 26 is thereby swung into engagement with the feed screw 20. Rotation of the feed screw causes the carriage to move to the left along the rotating mandrel and record, the knife 33 shaving on the outer surface of the rec 0rd to a depth equal to the difference in distance which the knife is ahead of the gauge bar relative to the record.

As may be seen in Fig. 1, the rear end of the knife bar 30, which is designated at 37 is engaged by a helical face cam 34. The face cam 34 is provided with a ratchet wheel 43 and an enlarged hang grip portion 40, which latter may conveniently be knurled. The face cam 34, ratchet wheel 43, and hand grip portion 40 are immovable relative to each other, and form a unit which will be referred to as the face cam unit. The members comprising the face cam unit may be secured together, as shown in Fig. 7 by pins 40a, or the unit may be made from a single piece of material. The face cam unit is rotatably mounted upon a shouldered screw 35, which, as may best be seen in Fig. 2, engages a screwthreaded opening in the back, (right hand in Fig. 2) side of the carriage 18. It will be seen that rotation of the face cam unit is effective to thrust the knife bar toward the record 17 or to permit retraction of the knife bar from the record under the influence of the spring 38.

Surrounding the screw 35, between the face cam unit and the carriage 18, is a spiral spring 36. The ends of the spiral spring engage suitable openings in the face cam unit and in the carriage, and the spring 36 tends to turn the face cam unit about the screw 35 in a clockwise direction as viewed from the front of the machine, and in a counterclockwise direction as viewed in Figs. 6 to 8. In other words, the spring 36 tends to bring the low point of the face cam 34 opposite the rear end 37 of the knife bar, thereby permitting the knife bar to be retracted from the record under the influence of the spring 38, a distance sufficiently great to clear the largest diameter record. The turning of the face cam unit in a clockwise direction is limited by the engagement of the step 3464 at the end of the helical face of the cam with the end 37 of the knife bar.

When the face cam unit is turned in a counterclockwise direction, as viewed from the front of the machine, the knife bar 30 and gauge bar 31 are thrust forwardly toward the record 17. In order to maintain the knife bar in its adjusted forward position, the ratchet wheel 43, as may be seen in Figs. 6, 7 and 8, may be engaged by a stop pawl 41. The stop pawl is pivotally mounted by means of a stepped screw 44 on the back of the carriage 18, and is held in yielding engagement with the ratchet wheel by means of a spiral spring 45 carried on the screw 44. The ends of the spring 45 engage the stop pawl and a pin on the carriage 18, and urge the free end of the pawl toward the ratchet. Thus it is seen that the pawl 41 and the face cam unit are effective to maintain the knife bar 30 in any adjusted forward posltion.

To facilitate the release and retraction of the knife bar, the stop pawl 41 is provided, as may be seen in Figs. 1, 2 and 6 to 9 with a finger piece 56. Depression of this finger piece turns the stop pawl against the pressure of the spring 45 about its pivot screw 44 to disengage the stop pawl from the ratchet wheel 43. As soon as the stop pawl and ratchet wheel have been disengaged, the spring 36 would turn the face cam unit about the screw 35 until the step 34a is brought against the rear end 37 of the knife bar, if at the same time the pawl 51 were disengaged from the bottom of the ratchet wheel 43. As will appear hereinafter depression of the finger piece also disengages the pawl 51 from the ratchet wheel, so that depression of the finger piece 56 permits the face cam unit to turn until the low portion of the helical face cam is directly in rear of the knife bar end 37. As the face ,cam unit turns to bring the lower portion of the cam in rear of the knife bar, the spring 38 moves the knife bar 30 back and away from the record 17. This arrangement provides for the release and retraction of the knife bar merely by depressing the finger piece 56.

An important feature of this invention is the provision of means for automatically advancing the knife a short distance toward the record after the completion of a shaving cut, so that a second shaving cut may be made without manually advancing the knife. This arrangement may best be seen in Figs. 3 to 8. Near the left hand end of the base plate 12, and substantially beneath the carriage rod 19, is an upwardly projecting abutment or actuator stud 50. As shown, the upper portion of the actuator stud comprises a half round, with the rounded face toward the right hand side of the machine.

Referring particularly to Fig. 3, as the carriage 18 moves to the left under the influence of the feed screw 20, the stud 50 will, after the knife 30 has passed to the left beyond the end of the record 17, be engaged by a downwardly projecting linger 49 on one arm of a bell crank 4'3. As may be seen in Figs. 6 to 8, the bell crank 47 is pivotally mounted on a shouldered screw 48 which engages a screwthreaded opening on the underside of the carriage 18. Because of the shoulder on the screw 48 the head of the screw is 1"" spaced from the carriage 18 a distance greater than the thickness of the bell crank. The opening in the bell crank through which the screw 48 passes is larger than the screw, so that the bell crank has a tilting as well as a pivotal freedom of movement on the screw.

Surrounding the shouldered portion of the screw 48, between its head and the bell crank 47, is a spiral spring 54 which tends to press the bell crank upwardly against the under side of the carriage 18, as well as to turn the bell crank in a counter-clockwise direction as viewed in Figs. 3 to 5. This turning movement is limited by the engagement of an upwardly projecting finger 55 on the bell crank 47 with the rear face of the carriage 18.

As the carriage 18 continues to move to the left after the finger 49 engages the stud 50, the reaction between this finger and the stud gradually turns the bell crank in a clockwise direction against the pressure of the spring 54 to the position shown in Fig. 4. Upon further movement of the carriage the finger 49 clears the stud 50, and the bell crank is turned by the spring 54 to the position shown in Fig. 5.

Still referring to Figs. 3 to 8, it will be seen that this turning movement of the bell crank 47 caused by the engagement of the finger 49 and the stud 50, causes the face cam unit to turn in the direction to advance the knife toward the record to a position for making the next shaving cut.

As may best be seen in Figs. 6 to 8, the bell crank arm 51 is turned upwardly at its outer end to form a feed pawl adapted to engage the bottom of and turn the ratchet wheel 43. The feed pawl normally is held in position to engage the ratchet wheel by the upward pres sure of the spring 54. This is the position shown in Figs. 3 and 6 of the drawings.

As the bell crank 47 is turned in a clockwise direction by the engagement of the finger 49 with the stud 50, the feed pawl 51 engages a tooth of the ratchet wheel 43 and turns the face cam unit in a clockwise direction, as viewed in Fig. 6, thereby advancing the knife bar toward the record a predetermined amount.

lVhen the finger 49 passes beyond the stud 50, as shown in Fig. 5, the bell crank 47 returns to its normal position, the feed pawl 51 tilting downwardly to ride under the next tooth of the ratchet wheel.

As the ratchet wheel is turned, the stop pawl 41 rides under a tooth of the ratchet wheel and engages the following tooth on the ratchet wheel to maintain the face cam unit in its new position.

Thus it is seen that simply, positively-opcrating means are provided for advancing the knife toward the record a predetermined amount after the completion of a shaving out, without any thought or effort on the part of the person operating the resurfacing machine. When the carriage reaches the end of its travel the knife has been automatically advanced, and the operator has merely to lift the forwardly projecting arm 18a of the carriage, slide the carriage back to the right hand end of the machine, and then lower the arm 18a so that the feed nut will engage the feed screw. When the carriage is turned by lifting the arm 18a, the bell crank finger 49 is moved out of alignment with the stud 50 so that these two members do not interfere with sliding movement of the carriage 18 along the rod 19.

Upon the completion of the shaving operation, comprising usually two or more shaving cuts, the operator depresses the finger piece 56 to release the stop pawl from the ratchet wheel 43. As may best be seen in Fig. 9, the finger piece 56 also is provided with an arm 57 adapted to engage and tiltingly depress the feed pawl 51 sufficiently to clear the teeth of the ratchet wheel 43. This arrangement provides a. simple mechanism whereby the knife bar is released and retracted from the record merely by depression of the finger piece 56.

The intention may be variously modified within the scope of the subjoined claims.

I claim:

1. In a machine for shaving sound-record tablets, the combination of a knife controlling means comprising a carriage, a knife holder slidably mounted on said carriage, yielding means normally tending to move the knife holder in one direction, cam means associated with said knife holder to move the knife holder against the yielding means, means tending at all times to move said cam means to release said knife holder and releasable means for maintaining the cam means in an adjusted position.

2. In a'machine for shaving sound-record tablets, the combination of a knife controlling means comprising a carriage. a knife holder slidably mounted thereon, yielding means normally tending to move the knife holder in one direction, a face cam bearing on one end of the knife holder to move the knife holder against the yielding means, yielding means for returning said face cam to an inoperative position and means for maintaining the face cam in an operated position.

3. The combination in a machine for shaving sound-record tablets, of a carriage, a knife support slidably mounted on said carriage, means normally tending to move the knife support in one direction, cam means'associated with the knife support to move the knife support in the opposite direction, means tending at all times to move said cam means to an inoperative position, and means normally preventing the operation of the last mentioned means.

4. The combination in a machine for shaving sound-record tablets of a tablet-supporting mandrel, a reciprocatory knife holder, yielding means normally tending to move the knife holder away from the mandrel, adjusting means operable from an inoperative position to advance said knife holder toward the mandrel, and means tending at all times to return said adjusting means to its inoper ative position.

5. The combination in a machine for shaving sound-record tablets of a tablet-supporting mandrel, a reciprocatory knife holder, yielding means normally tending to move the knife holder away from the mandrel, adjusting means operable from an inoperative position to advance said knife holder toward the mandrel, means tending at all times to return said adjusting means to its inoperative position, and means for-detaining said adjusting means in an operated positive.

6. The combination in a machine for shaving sound-record tablets of a tablet-supporting mandrel, a reciprocatory knife holder, yielding means normally tending to move the knife holder away from the mandrel, adjusting means operable from an inoperative position to advance said knife holder toward the mandrel, means tending at all times to return said adjusting means to its inoperative position, and means for automatically actuating said adjusting means to provide a step by step advance of said knife holder.

7. The combination in a machine for shaving sound-record tablets of a tablet-supporting mandrel, a reciprocatory knife holder, yielding means normally tending to move the knife holder away from the mandrel, adjusting means operable from an inoperative position to advance said knife holder toward the mandrel, means tending at all times to return said adjusting means to its inoperative posit-ion, means for detaining said adjusting means in an operated position, and means for automatically actuating said adjusting means to provide a step by step advance of said knife holder.

8. The combination in a machine for shaving sound-record tablets of a tablet-supporting mandrel, a movable knife holder, yielding means normally tending tomove the knife holder away from the mandrel, adjusting means operable from an inoperative position to advance said knife holder toward the mandrel, means tending at all times to return said adjusting means to its inoperative position, means for detaining said adjusting means in an opera-ted position, means for automatically actuating said adjusting means to provide a step by step advance of said knife holder, and means whereby release of said detaining means simultaneously renders said automatically actuating means inoperative and permits the return of said adjusting means to its inoperative position.

9. The combination 111 a machine for shaving sound-record tablets of a slidably mounted knife holder, yielding means tend ing to retract said knife holder, a manually rotatable member mounted adjacent said knife holder, a spiral cam on saidrotatab'le member adapted to engage said knife holder to move it toward the mandrel when said member is rotated, yielding means tending to thin said member to withdraw said cam out of contact with said knife holder, and releasable means for detaining said member in a rotated position. I j

10. The combination in a machine for shaving sound-record tablets of a slidably mounted knife holder, yielding means tending to retract said knife holder, a manually rotatable member mounted adjacent said knife holder, a spiral cam on said rotatable member adapted to: engage said knife holder to move it toward the mandrel when said member is rotated, means for locking said knife holder in an advance position, and yielding means tending to turn said member to withdraw said cam out of Contact with said knife holder.

11. The combination in a machine for shaving sound reco'rd tablets of a slidab'ly mounted knife holder, yielding means tending to retract said knife holder, a manually rotatable member mounted adjacent said knife holder, a spiral cairn on siaidi 'ota-table member adapted to engage said knifeholder to move it toward the mandrel when said member is rotated, yielding means tending to turn said member to withdraw said clam out of contact with said knife holder, ancl a pawl and ratchet device for automatically rotating said member in adirection to advance said knife holder.

12. The combination in a machine for shaving sound-reco rd tablets of a slidably mounted knife holder, yielding means tend-- ing to retract said knife holder, a. manually rotatable member mounted adjacent said knife holder, a spiral cam on saidrotatahle member adapted to: engage said knife holder to move it toward the mandrel when said member isrotated, yielding means; tending to' turn said member to withdraw said earn out of contact with said knife holder, a pawl and ratchet device for automatically rotating said member in a direction to advance said knife holder,- and releasable means for detaining said member in a rotated position. 4

13. The combination a machine fershaving sound-record tablets of a slidabl mounted knife holder, yielding means tending to retract said knife holder, a manually retatable member mounted adjacent said knife holder, a spiral cam on said rotatable member adapted to engage said knife holder to move it toward the mandrel when said item her is rotated, yielding means tending to turn said member to withdraw said cam out of; contact with said knife holder, a pawl and ratchet-device for automatically rotating said fin - November, 1928.

member in a direction to advance said knife holder, releasable means for detaining said member in a rotated position, and means for rendering said pawl and ratchet device inoperative upon release of said detaining means.

14. The combination in a machine for shaving sound-record tablets of a slidably mounted knife holder, yielding means tending to retract said knife holder, a manually rotatable member mounted adjacent said knife holder, a. spiral cam of relatively large diameter and pitch on said rotatable member adapted to engage said knife holder to move it toward the mandrel when said member is rotated, and means for locking said knife holder in an advanced position. 7

15. The combination in a record-resurfacing machine of the slidably mounted knife bar 30, the spring 38 normally tending to retract said knife bar, the face cam 3 1 adapted to advance said knife bar, the spring 36 normally tending to move said cam to an inoperative position, and ratchet wheel 43 and stop pawl 41 for preventing movement of said cam by said spring 36.

16. The combination in a record-resurfacing machine of the slidably mounted knife bar 30, the spring 38 normally tending to retract said knife bar, the face cam 34; adapted to advance said knife bar, the spring 36 normally tending to move said cam to an inoperative position, ratchet wheel 43 and stop pawl 41 for preventing movement of said cam by said spring 36, the feed pawl 47 for moving said cam in opposition to said spring 36, and means for actuating said feed pawl.

17. The combination in a machine for shaving sound-record tablets, of a tablet supporting mandrel, driving means for said mandrel, means cooperative with said drivingmeans for feeding the carriage along the mandrel in a single direction, a knife mounted on said carriage to shave a tablet during the said feed of said carriage, and means responsive to the movement of the carriage as it is fed by said driving means for advancing the knife toward the mandrel.

18. The combination in a machine for shaving sound-record tablets, of a tablet supporting mandrel, driving means for said mandrel, means cooperative with said driving means for feeding the carriage along the mandrel in a single direction, a knife mounted on said carriage to shave a tablet during the said feed of said carriage, and means responsive to the movement of the carriage as it is fed by said driving means for advancing the knife toward the mandrel after it has traversed the surface of the tablet.

In testimony whereof, I have signed my name to this specification this 6th day of WELIAM F. FEYRER. 

